package com.hyz.reggie.service.Impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hyz.reggie.common.BaseContext;
import com.hyz.reggie.dao.OrderMapper;
import com.hyz.reggie.pojo.*;
import com.hyz.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private CartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Transactional(rollbackFor = AcquireExecption.class)
    @Override
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentID();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new AcquireExecption("购物车为空，不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new AcquireExecption("用户地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

    @Override
    public IPage<Orders> getPage(Integer page, Integer pageSize, Long number, String beginTime, String endTime) {
        IPage<Orders> iPage = new Page<>(page, pageSize);
        LambdaQueryWrapper<Orders> qwq = new LambdaQueryWrapper<>();
        if (number != null) {
            qwq.eq(Orders::getNumber, number);
        }
        if (beginTime != null && endTime != null) {
            qwq.between(Orders::getOrderTime, beginTime, endTime);
        }
        if (beginTime != null && endTime == null) {
            qwq.between(Orders::getOrderTime, beginTime, LocalDateTime.now());
        }
        iPage = page(iPage, qwq);
        return iPage;
    }

    @Override
    public void sendOrders(Orders orders) {
        LambdaUpdateWrapper<Orders> qwq = new LambdaUpdateWrapper<>();
        qwq.set(Orders::getStatus, orders.getStatus());
        qwq.eq(Orders::getId, orders.getId());
        update(qwq);
    }

    @Override
    public IPage<Orders> getUserPage(Integer page, Integer pageSize) {
        IPage<Orders> iPage = new Page<>(page, pageSize);
        LambdaQueryWrapper<Orders> qwq = new LambdaQueryWrapper();
        qwq.orderByDesc(Orders::getOrderTime);
        iPage = page(iPage, qwq);
        return iPage;
    }

    @Override
    public void moreAgain(Orders orders) {
        Long id = orders.getId();
        Long userId = BaseContext.getCurrentID();
        LambdaQueryWrapper<OrderDetail> qwq = new LambdaQueryWrapper<>();
        qwq.eq(OrderDetail::getOrderId, id);
        List<OrderDetail> list = orderDetailService.list(qwq);
        List<ShoppingCart> shoppingCarts = new ArrayList<>();
        list.stream().forEach(od -> {
            ShoppingCart cart = new ShoppingCart();
            cart.setNumber(od.getNumber());
            cart.setUserId(userId);
            cart.setAmount(od.getAmount());
            cart.setDishFlavor(od.getDishFlavor());
            cart.setImage(od.getImage());
            if (od.getDishId() != null) {
                cart.setDishId(od.getDishId());
            }
            if (od.getSetmealId() != null) {
                cart.setSetmealId(od.getSetmealId());
            }
            shoppingCarts.add(cart);
        });
        LambdaQueryWrapper<ShoppingCart> qaq = new LambdaQueryWrapper<>();
        qaq.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> carts = shoppingCartService.list(qaq);
        if (carts.size() != 0) {
            shoppingCartService.remove(qaq);
        }
        shoppingCartService.saveBatch(shoppingCarts);
    }
}